Fan-belt pulley for automobiles



Dec. 21, 1926.

S. I. FEKETE FAN BELT PULLEY FOR AUTO MOBILES Filed July 28, 1923 I J M MQMWA flaw/g INVEN'I'EJV:

Patented Dec. 21, 19:26.

n rjr a star STEPHEN I. FEKETE, or DE ROIT. MICHIGAN, ASSIGNOR TO HUDSON Moron can COMPANY, on -DE'I'ROIT,V1VIICI-IIGAN, n CORPORATION or MICHIGAN.

rAN-nnm' I' L EY ronjauTo oBILEs.

Application filed July 2'8, 1323. Serial no. 654,325.

This invention relates to a new and useful improvement in pulleys. It is especially intended for use as the lower fan pulley' for an automobile engine, but the invention is not. intended to be limited to such use. The objectof the invention is to provide a pulley of simple and cheap form of construction and of lightweight yet sufficiently strong to perform the work required of, it. One feature of the invention-"consists in forming the pulley out of two shells eaohstamped out of a blank of sheet material. Another feature of the invention relates to the means for making driving Connection between'thepulley' and the hub of a driving gear.

The invention will be fully understood by reference to the following description when taken in connection with the accompanying drawings, and the novel features thereof are clearly pointed out and distinctly defined in the claims at the close of this specification.

In the drawings, Fig. 1 is a side elevation,

partly in section showing a pontion'of a. crank shaft with its chain driving gear and a pulley embodying the invention.

Fig. 2 is a sectiono-n line 22'of Fig. 1.

Fig. 3 is an end-view of one of the two shells. after it isv stampedfout ready'to be rim,

united with a companion shell to form the pulley., i

Fig. 4 is a section o'n'line 4 f Fig. 3.

Referring now to the drawings, .1, is a. crank shaft on which" is; mounted the ordinary chain driving gear 2 and pulley 4 cmbodying'the invention; The gear 2 is fast to the shaft and is provided' with a hub 3 which is adapted to engage the pulley 4E and cause it to rotate with the shaft. Thereis shown at 5 a portion ofa fanjbelt which is driven by the pulley. I

The pulley is composed of two companion i shells placed in inverted, relation to each other back to back and secured together, each of the shells having a flanged annular the two flanges forming the groove of the pu'1ley,'the bases of the shells having a hole through which the shaft passes, shell having means for looking it to the hub of the gear so as to rotate therewith.

The two shells arefirst made exactly alike. Each piece is stamped or drawn out of a single sheet of steel or other suitable ma'- terial in such manner as to form a cupshaped seamless shell having a base 6, a. cylindrical 'body' portipn 7 and an annular and the flange 8"ter1'ninating in a lip 9. There is cut out of the blank, preferably at the'same stamping'a hole 10 of the size of the shaft onwhich the pulleyis to be mounted. There are. also stamped out in each shell, two

tongues 11, 11, diametrically opposite. each other by cutting slots 12,12 leading from the periphery of'the hole 10 in the blank. The

tongues 11, 11-on one of thetwo shellsjar'e then turned inwardly as shown in dotted lines in Fig. 4 for the purpose to be hereinafter described, it not being necessary to turn up the tongues of the other shell as the tongues of only one of saidfl'shells perform any function. The reason for making both shells with these tongues is to render them.

1 nnate interchangeable, and thus avoid the necessity of making two sets of shells one, with tongues and one without tongues.

placed base to base with the tongues 11 of one of the shells disposed at an angle of 90 from the tongues. of the other shell as plain The shell is open. at the outer side, that is at what might be 1y shown in Fig. 2. In this position the two shells "are secured together,.preferably by spot welding, as indicated at 13. Any other suitable means of uniting them may be em- 7 ployedgl The pulley is now complete, the

groove l l for the belt beingformed between thefianges 8,8,of the two companion shells.

' The hub 3 of the gear is formed with two slots 15, 15, diametrically opposite to each other of a width equalto the widthof the tongues 11 and with which the tongues of the shell whichis nearer the hub of the gear will engage. The tongues 11, 11, when thus engaged with the recesses 15,15 form dri'v ing connections between the hub of the gear and the pulley.

Suitable means are provided for maintaining the pulley against axial outward movement on' the shaft to hold the said tongues 11 in, engagement with the recesses 15. The means shown] consists of a remov-- able collar 16.

The-pulley thus formed is much lighter 5 than the heavy cast iron pulleys usually employed yet is suflieiently strong for the work ture. While the pulley has been shown and 

